Gray Nike running shoes with neon swoosh

I lost my gray Nike running shoes yesterday around 3pm on Congress Street in Portland, ME, near the Eastern Promenade. They are Nike Air Zoom Structure, size 9.5, with charcoal gray uppers and a neon green swoosh. One shoe has a tiny blue thread snag on the tongue, and the other has a small coffee stain near the laces. They were a gift from my sister and have a lot of sentimental value, so I am really hoping someone picked them up and can help me get them back. If you found them, send me a message and we can figure out a meetup; I would be grateful to return the favor.